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vaieri [72.5K]
3 years ago
6

The graph shows the relationship between inches, x, and miles, y, on a map. Which equation represents the proportional relations

hip.
A y = x + 5
B y = 1/5x
C y = 5x
D y = 10x
I'll show you the graph ​

Mathematics
2 answers:
Sergeeva-Olga [200]3 years ago
7 0
The answer here is C, it is the answer because 10/2 = 5 20/4 = 5 so if you multiply it is always multiplied by 5
Slav-nsk [51]3 years ago
5 0

Step-by-step explanation:

The answer is C .

I took tha test it !

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Find the unit rate. round to the nearest hundredth, if necessary.<br><br>$360 for 13 ft2 ​
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Step-by-step explanation:

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The ratio of pens to pencils in Mrs. Bosworth's desk is 4:1. What does this mean?
anzhelika [568]
If there are 4 pens there will be 1 pencil, if there is 1 pencil there will be 4 pens
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3 years ago
There are 2,000 eligible voters in a precinct. A total of 500 voters are randomly selected and asked whether they plan to vote f
Ann [662]

Answer:

0.7 - 2.58 \sqrt{\frac{0.7(1-0.7)}{500}}=0.647

0.7 + 2.58 \sqrt{\frac{0.7(1-0.7)}{500}}=0.753

And the 99% confidence interval would be given (0.647;0.753).

So the correct answer would be:

a. 0.647 and 0.753

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{p(1-p)}{n}})

Solution to the problem

The estimated population proportion for this case is:

\hat p = \frac{350}{500}=0.7

The confidence interval would be given by this formula

\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}

For the 99% confidence interval the value of \alpha=1-0.99=0.01 and \alpha/2=0.005, with that value we can find the quantile required for the interval in the normal standard distribution.

z_{\alpha/2}=2.58

And replacing into the confidence interval formula we got:

0.7 - 2.58 \sqrt{\frac{0.7(1-0.7)}{500}}=0.647

0.7 + 2.58 \sqrt{\frac{0.7(1-0.7)}{500}}=0.753

And the 99% confidence interval would be given (0.647;0.753).

So the correct answer would be:

a. 0.647 and 0.753

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This is a lot of math to write.... so I'll just say the answer is -21 :D
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